[aws.cloudtrail] Ingest Pipeline Improvments

[brijesh-elastic]

Proposed commit message

aws.cloudtrail: ingest pipeline improvments

This PR replaced every `ignore_failure: true` with an `ignore_missing` flag or condition guard where
failure was expected and an explicit `on_failure` handler reporting to `error.message` where
it wasn't, so routine cases no longer throw per document and real faults surface instead of
being silently swallowed.

Checklist

• I have reviewed tips for building integrations and this pull request is aligned with them.
• I have verified that all data streams collect metrics or logs.
• I have added an entry to my package's changelog.yml file.
• I have verified that Kibana version constraints are current according to guidelines.
• I have verified that any added dashboard complies with Kibana's Dashboard good practices

How to test this PR locally

• Clone integrations repo.
• Install elastic package locally.
• Start elastic stack using elastic-package.
• Move to integrations/packages/aws directory.
• Run the following command to run tests.

elastic-package test -v

Related issues

• Relates aws.cloudtrail: Ingest pipeline & ECS mapping improvements #20040

[elastic-vault-github-plugin-prod]

✅ All changelog entries have the correct PR link.

[infra-vault-gh-plugin-prod]

💔 Build Failed

• Buildkite Build
• Commit: 1046295

Failed CI Steps

• Check integrations aws

History

• 💚 Build #47219 succeeded d8f26cb
• 💔 Build #46865 failed 6584de8

cc @brijesh-elastic